The best resources for finding reviews of dance performances and works are newspapers, dance journals and magazines, and websites devoted to dance.
Start your search with whatever information you know about the performance: its title, the choreographer, featured performers, music used (and its composer). Pro tips:
You can find print copies of these dance magazines and journals on the 2nd floor of the library. Look for call numbers that start with GV.
And these print journals are in the 3rd floor stacks. Again, look for call numbers that start with GV.